1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2007 Kai Wang 5 * Copyright (c) 2007 Tim Kientzle 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/queue.h> 34 #include <sys/stat.h> 35 #include <archive.h> 36 #include <archive_entry.h> 37 #include <errno.h> 38 #include <libgen.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 43 #include "ar.h" 44 45 static int read_archive(struct bsdar *bsdar, char mode); 46 47 int 48 ar_mode_p(struct bsdar *bsdar) 49 { 50 51 return (read_archive(bsdar, 'p')); 52 } 53 54 int 55 ar_mode_t(struct bsdar *bsdar) 56 { 57 58 return (read_archive(bsdar, 't')); 59 } 60 61 int 62 ar_mode_x(struct bsdar *bsdar) 63 { 64 65 return (read_archive(bsdar, 'x')); 66 } 67 68 /* 69 * Handle read modes: 'x', 't' and 'p'. 70 */ 71 static int 72 read_archive(struct bsdar *bsdar, char mode) 73 { 74 struct archive *a; 75 struct archive_entry *entry; 76 struct stat sb; 77 struct tm *tp; 78 const char *bname; 79 const char *name; 80 mode_t md; 81 size_t size; 82 time_t mtime; 83 uid_t uid; 84 gid_t gid; 85 char **av; 86 char buf[25]; 87 char find; 88 int exitcode, flags, r, i; 89 90 if ((a = archive_read_new()) == NULL) 91 bsdar_errc(bsdar, 0, "archive_read_new failed"); 92 archive_read_support_format_ar(a); 93 AC(archive_read_open_filename(a, bsdar->filename, DEF_BLKSZ)); 94 95 exitcode = EXIT_SUCCESS; 96 97 for (;;) { 98 r = archive_read_next_header(a, &entry); 99 if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY || 100 r == ARCHIVE_FATAL) 101 bsdar_warnc(bsdar, archive_errno(a), "%s", 102 archive_error_string(a)); 103 if (r == ARCHIVE_EOF || r == ARCHIVE_FATAL) 104 break; 105 if (r == ARCHIVE_RETRY) { 106 bsdar_warnc(bsdar, 0, "Retrying..."); 107 continue; 108 } 109 110 if ((name = archive_entry_pathname(entry)) == NULL) 111 break; 112 113 /* Skip pseudo members. */ 114 if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0 || 115 strcmp(name, "/SYM64/") == 0) 116 continue; 117 118 if (bsdar->argc > 0) { 119 find = 0; 120 for(i = 0; i < bsdar->argc; i++) { 121 av = &bsdar->argv[i]; 122 if (*av == NULL) 123 continue; 124 if ((bname = basename(*av)) == NULL) 125 bsdar_errc(bsdar, errno, 126 "basename failed"); 127 if (strcmp(bname, name) != 0) 128 continue; 129 130 *av = NULL; 131 find = 1; 132 break; 133 } 134 if (!find) 135 continue; 136 } 137 138 if (mode == 't') { 139 if (bsdar->options & AR_V) { 140 md = archive_entry_mode(entry); 141 uid = archive_entry_uid(entry); 142 gid = archive_entry_gid(entry); 143 size = archive_entry_size(entry); 144 mtime = archive_entry_mtime(entry); 145 (void)strmode(md, buf); 146 (void)fprintf(stdout, "%s %6d/%-6d %8ju ", 147 buf + 1, uid, gid, (uintmax_t)size); 148 tp = localtime(&mtime); 149 (void)strftime(buf, sizeof(buf), 150 "%b %e %H:%M %Y", tp); 151 (void)fprintf(stdout, "%s %s", buf, name); 152 } else 153 (void)fprintf(stdout, "%s", name); 154 r = archive_read_data_skip(a); 155 if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY || 156 r == ARCHIVE_FATAL) { 157 (void)fprintf(stdout, "\n"); 158 bsdar_warnc(bsdar, archive_errno(a), "%s", 159 archive_error_string(a)); 160 } 161 162 if (r == ARCHIVE_FATAL) 163 break; 164 165 (void)fprintf(stdout, "\n"); 166 } else { 167 /* mode == 'x' || mode = 'p' */ 168 if (mode == 'p') { 169 if (bsdar->options & AR_V) { 170 (void)fprintf(stdout, "\n<%s>\n\n", 171 name); 172 fflush(stdout); 173 } 174 r = archive_read_data_into_fd(a, 1); 175 } else { 176 /* mode == 'x' */ 177 if (stat(name, &sb) != 0) { 178 if (errno != ENOENT) { 179 bsdar_warnc(bsdar, 0, 180 "stat %s failed", 181 bsdar->filename); 182 continue; 183 } 184 } else { 185 /* stat success, file exist */ 186 if (bsdar->options & AR_CC) 187 continue; 188 if (bsdar->options & AR_U && 189 archive_entry_mtime(entry) <= 190 sb.st_mtime) 191 continue; 192 } 193 194 if (bsdar->options & AR_V) 195 (void)fprintf(stdout, "x - %s\n", name); 196 /* Disallow absolute paths. */ 197 if (name[0] == '/') { 198 bsdar_warnc(bsdar, 0, 199 "Absolute path '%s'", name); 200 continue; 201 } 202 /* Basic path security flags. */ 203 flags = ARCHIVE_EXTRACT_SECURE_SYMLINKS | 204 ARCHIVE_EXTRACT_SECURE_NODOTDOT; 205 if (bsdar->options & AR_O) 206 flags |= ARCHIVE_EXTRACT_TIME; 207 208 r = archive_read_extract(a, entry, flags); 209 } 210 211 if (r) { 212 bsdar_warnc(bsdar, archive_errno(a), "%s", 213 archive_error_string(a)); 214 exitcode = EXIT_FAILURE; 215 } 216 } 217 } 218 219 if (r == ARCHIVE_FATAL) 220 exitcode = EXIT_FAILURE; 221 222 AC(archive_read_close(a)); 223 AC(archive_read_free(a)); 224 225 return (exitcode); 226 } 227